Finland will erect barriers at four crossings on its border with Russia from midnight, officials said on Friday, in a bid to stem an increase in migrants it says has been orchestrated by Moscow.
Finland has accused Russian authorities of funnelling migrants to the crossings in retaliation for its decision to increase defence cooperation with the United States, an assertion dismissed by the Kremlin.
Barriers will go up at four of the nine crossings with Russia, at Vaalimaa, Nuijamaa, Imatra and Niirala in its southeast, the Finnish Border Guard said.
"Our aim is to use barrier devices to prevent entry," the Border Guard's head of international affairs, Matti Pitkaniitty, told reporters. The measures were a response to changes in Russia's border policy, he added.
Some 300 asylum seekers, mostly from Iraq, Yemen, Somalia and Syria, have arrived in Finland this week, according to the Border Guard.
Nearly 100 had entered Finland from Russia by midday on Friday alone, officials said.
Finland shares a 1,340-km (833-mile) border with Russia that also serves as the EU's external border.
Helsinki angered Moscow when it joined the Nato military alliance in April, after decades of non-alignment, following Russia's invasion of Ukraine.
From Saturday asylum seekers arriving via Russia will only be allowed to hand in their applications at two northern border crossings, at Salla and Vartius, Pitkaniitty said.
Finland's ombudsman for non-discrimination said on Thursday Helsinki still had a duty under international treaties and EU law to allow asylum seekers.
European Union border agency Frontex told Reuters it would send officers to Finland to help safeguard the frontier.
"We...are preparing to provide immediate assistance through the additional deployment of our standing corps officers," a Frontex spokesperson said in an email.
European Commission President Ursula von der Leyen on Thursday thanked the Finnish authorities for protecting the bloc's external border.
"Russia's instrumentalisation of migrants is shameful," she added.
